diff --git a/internal/domains/api/dto/api_request_dto.go b/internal/domains/api/dto/api_request_dto.go
index 6a2b622..b6bf636 100644
--- a/internal/domains/api/dto/api_request_dto.go
+++ b/internal/domains/api/dto/api_request_dto.go
@@ -131,7 +131,8 @@ type QCXGA8V3Req struct {
 	VinCode string `json:"vin_code" validate:"required"`
 }
 type QCXG8N4RReq struct {
-	PlateNo string `json:"plate_no" validate:"required"`
+	PlateNo string `json:"plate_no" validate:"omitempty"`
+	VinCode string `json:"vin_code" validate:"omitempty"`
 }
 type QCXGH3R8Req struct {
 	VinCode string `json:"vin_code" validate:"required"`
diff --git a/internal/domains/api/services/processors/qcxg/qcxg8n4r_processor.go b/internal/domains/api/services/processors/qcxg/qcxg8n4r_processor.go
index d714b0d..a183eab 100644
--- a/internal/domains/api/services/processors/qcxg/qcxg8n4r_processor.go
+++ b/internal/domains/api/services/processors/qcxg/qcxg8n4r_processor.go
@@ -22,9 +22,17 @@ func ProcessQCXG8N4RRequest(ctx context.Context, params []byte, deps *processors
 		return nil, errors.Join(processors.ErrInvalidParam, err)
 	}
 
+	carNo := paramsDto.VinCode
+	if carNo == "" {
+		carNo = paramsDto.PlateNo
+	}
+	if carNo == "" {
+		return nil, errors.Join(processors.ErrInvalidParam, errors.New("plate_no、vin_code 至少需要传其中一个"))
+	}
+
 	reqParams := map[string]interface{}{
 		"key":   "5d253801dbde7ccd75639449b6c91fe2",
-		"carNo": paramsDto.PlateNo,
+		"carNo": carNo,
 	}
 
 	apiPath := "/communication/personal/10186"